Reciprocating bed motion



Jan. 4, 1927.,

C. BERTHIEZ RECIPROGATING BED MOTION Filed June 29, IQZS 2 sheetsShei 1[711/6 nfor: C. .5 6 rf/iz'ez fH-fy s.

une 29. 1925 v a mm M 4 w 7 Q 6 H m 5% 4 C H HW m9 2y Patented Jan. 411292!.

STATES CHARLES BERTHIEZ, 0F PARIS, FRANCE.

BECIPROCATING BED MOTION.

Application filed June 29, 1925, Serial The present invention relates toa special drive arrangement for the table or bed of planing machines andanalogous machine tools.

In the French Patent No. 527,426 of November 16, 1918, and in theaddition thereof No. 23,843 of July 5, 1919, deposited in the same namean additional drive is disclosed for the effective stroke or cuttingstroke of the bed or table, the said additional drive being coupled upat the beginning of the cutting stroke and uncoupled at the end thereofso as to assure a .greater cutting power.

In conformity with the present invention auxiliary tappets are used forthe coupling up and uncoupling of this additional drive, which auxiliarytappets are fitted in an adjustable position on the principal tappetsfixed to the table of the planing machine and thus bringing about thereversal of the table. These auxiliary tappets through a system oflevers cause the displacement of a sleeve coupling fitted loosely on theshaft bearing the fixed and loose pulleys of the ordinary drive, whichis coupled or uncoupled with a corresponding sleeve keyed to the shaft,the first sleeve being connected to the driving motor by gearing so thatthe rack of the table is driven thereby during the cutting stroke bygearing, that is to say by a positive connection in which there can beno slipping.

Consequently whatever may be the power of the motor it will betransmitted to the table of the planer during the cutting stroke withoutany slipping, an impossibility in a belt drive. This enables asutliciont power to be transmitted during the cut to enable a big cut tobe taken without reducing the speed of the table, thus assuring a bigout put.

In addition, the coupling and uncoupling of the additional drive, bymeans of the auxiliary tappets fitted on the tappets which assure thereversing of the table, has the further advantage of not overloading thecam destined for the automatic feed of the toolholder as is the case inthe arrangements disclosed in the patents referred to above.

The system of levers worked by the tappets is provided with a springarrangement allowing the teeth of the two sleeves to be coupled upsafely.

The accompanying drawings illustrate one example of an application ofthe invention.

No. 40,406, and in France July 2, 1924.

Fig. 1 is a partial end elevation of the planer provided with theadditional drive arrangement.

Fig. 2 is a side elevation viewed from the left of Fig. 1.

Fig. 3 is a plan view of Fig. 1, and

Fig. 4 is an enlarged scale view showing part of Fig. 1. i

The table a of the planer is fitted as usual with the principal tappetsa and a the first producing the reversing at the end of the cuttingstroke and starting the return stroke, whereas the tappet a stops thedrive at the end of the return stroke and starts the cutting stroke.

These tappets a and a act for this purpose on rollers fitted on a leverZ) articulated at Z) on the bed of the machine and con nected by a rod 5(with handle 6 for hand drive) to a cam grooved slide actuating theforks b which produce the displacement of the straight and crossed beltsc 0 on the loose pulleys d d and fast pulleys d d mounted on shaft d.The pulleys Li (Z actuate the movement of the table for the cutting andreturn stroke respectively.

In accordance with the invention, on the principal tappet a there isfitted an auxiliary adjustable tappet 0 which latter serves to producethe coupling up of the additional drive during the cutting stroke, andsimilarly on the principal tappet a there is fitted a tappet 6 alsoadjustable, which produces the uncoupling of the additional drive.

At the end of the return stroke of the table a the principal tappet ameets the small bent lever f articulated at f on a bent lever g turningon the fulcrum b of lever b. The small bent lever f oscillates inletting the tappet (0 pass then regain its original position underinfluence of a recoil spring f When the table comes back aftertravelling a distance of approximately 2 inches in the direction of thecutting stroke the auxiliary tappet e fitted on. the principal. tappeta, knocks against the lever and carries with it this small lever attheopposite back end of the transverse shaft h is fixed a lever hconnected by a sliding articulation to a rod 2'. Rod i is in two partsconnected together by a box 71 in which a spring 2' is fitted. The rod2' is tied to a lever j secured on a small transverse shaft j on theback end of which shaft is fixed an arm j connected by a rod and an arm7' to the articulation fulcrum k of fork 76 working a sleeve 70. Thelatter is fitted loosely on shaft (Z on which are fitted pulleys (Z (Zof the ordinary drive and integral with a pinion Z and a pulley Z onwhich passes a belt 0 driving the countershaft (not shown). This pulleyZ is provided on the inside with teeth Z which can be coupled up by thelongitudinal displacement of sleeve on shaft (Z with the teeth m of asleeve m keyed on shaft d. Between the teeth m small rollers m areprovided to facilitate the throwing in and out of the teeth F.

The pinion Z is on the other hand con nected by gearing a n to the motorat, the pinion n being made of a special width so as to remain geared upwith pinion Z during the longitudinal displacen'lent of sleeve It) onshaft (Z. The ordinary drive of the table takes place by gears 0, 0 0 0the latter being gearedup with the rack (i fixed under the table a.

At the end of the return stroke of the table the principal tappet acauses the small bent lever f to turn over as explained above which letspass the tappet e". The latter in acting on roller 6 of the lever 6produces through the intermediary of the rod b of the slide Zr and theforks b the stopping of the return stroke and the starting of thecutting stroke of the ordinary drive, in causing the belts to passrespectively on the loose pulley (Z corresponding to the return strokeand on the fixed pulley (Z corresponding to the cutting stroke.

.Vhen the table has travelled about 2 inches in the cutting direction(which length can be regulz'lted by adjusting the position of theauxiliary tappet e on tappet a this auxiliary tappet e knocks againstlever causing-the same to oscillate as also lever on which it isfittedand the arm g integral with same. The movement is transmitted by meansof 7 a 7L3: v .7 7 j i b, 71: to sleeve l: which is longitudinallydisplaced on shaft cl with the toothed wheel Z and the sleeve coupling ZThe latter now comes in contact with the corresponding sleeve in so thatshaft (Z receives the driving power direct. from motor a through thegears a a, Z.

During the whole effectual cutting stroke the motor a is consequentlyconnected to the rack a of the table a by gearing so that the desiredpower can be suppl ed without any slipping whatsoever taking place inthe transmission thereof.

During this direct motor drive of the table the belt of the ordinarydrive is slipping on pulley 03 The diameter of the pulleys keyed on thecountershaft and on which pass belts 0, c 0 driving pulleys Z (Z (Z isso chosen that the speed of rotation of the sleeve coupling m (impelledduring the ordinary drive by the pulleys (Z (F) is slightly above thatof sleeve Z directly impelled by the motor during the additional drive,so that the coupling up and uncoupling of the sleeves is facilitated.

Slightly before the end of the cutting stroke the auxiliary tappet cfitted on tappet a acts on roller 9 fitted on the bent lever g andcauses this lever to oscillate in the reverse direction to the movementprovoked by the tappet 6 This oscillating movement produces by the sametransmission as that of the starting of the additional drive, thestopping of same. The table a continues to travel in the cuttingdirection under the influence of the belt driving the fixed pulley (Z bythe ordinary drive. At the end of the cutting stroke the principaltappet a knocking against roller b of lever Z) causes the stopping ofthe cutting stroke to take place and the starting of the return strokeby means of lever b, the connecting rod 6 the slide 6 and the forks blVith the help of the spring box '5 11 in the rod 2', the sleeve is iselastically brought towards the sleeve m until the teeth Z of the firstare opposite the hollow counterpart of the teeth m of the second andcome into mesh with same.

On the other hand it should be noticed that when lever g oscillatesunder the action of tappet e on lever f (for the starting of additionaldrive) the articulation fulcrums of the connecting rod 2' to the arms 7Land j are in such a position to shaft 7L that the sleeve coupling is,once it has been brought in the starting position of the additionaldrive, maintained in that position.

The arm 72, is provided with a handle it and is bent at the bottom inthe form of a pedal 72. to enable the stopping of the additional driveboth by hand and foot if need be. Should it be required to work in bothdirections of the working of the table, the power transmitted during thereturn stroke could be reinforced by using for this stroke also theadditional drive which would be' started and stopped by an identicaltransmission to that used for the additional drive of the cutting strokeand actuated by a second set of auxiliary tappets fitted on theprincipal tappets.

at I claim is:

1. Means for the driving of tables of planing machines and the like. ofthe additional drive type for the cutting stroke of the table,comprising, a table, a rack for driving the table, principal tappetsfitted to the table, an auxiliary tappet adjustably carried by each ofthe principal tappets, a drive shaft, means connecting the drive shaftto the rack, fast and loose pulleys on the drive shaft for the ordinarydrive, a coupling sleeve loosely mounted on the drive shaft, a leversystem operatively connecting the auxiliary tappets With the couplingsleeve. a second sleeve keyed to the drive shaft and arranged to becoupled to and uncoupled from, the coupling sleeve. a drive motor, andgearing connecting the coupling sleeve to the drive motor, whereby Whenthe sleeves are coupled the drive motor positively drives the tablerack.

2. Means for the driving of tables of planing machines and the like, ofthe additional drive type for the cutting stroke of the table,comprising, a table, rack for driving the table, principal tappetstitted to the table, an auxiliary tappet adjustably carried by each ofthe principal tappets,

a drive shaft, means connecting the drive shaft to the rack, fast andloose pulleys on the drive shaft for the ordinary drive, a

coupling sleeve loosely mounted on the drive shaft, a lever systemoperatively connecting the auxiliary tappets With the coupling sleeve, asecond sleeve keyed t0 the drive shaft and arranged to be coupled to anduncoupled from, the coupling sleeve, a drive CHARLES BERTHIEZ.

